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Substantial Planned Downtime Friday

PrimeGrid - Po, 19.11.2018 - 23:27
This Friday, PrimeGrid is moving to new servers. Everything (except our Discord chat server) will be offline for several hours. Since the forums will be down, Discord will be the only way to communicate with us. More information can be found on the forums here: http://www.primegrid.com/forum_thread.php?id=7592&nowrap=true#122692
Kategórie: Novinky z projektov

Fall/Winter 2018 Funding Drive has started.

SETI@Home - Ne, 18.11.2018 - 21:42
We've started our 2018 funding drive. Many of you have probably received our email penned by one of our undergraduate researchers. If you can't wait, you can read yours here.

Because we're not yet fully GDPR compliant, we're not sending emails to anyone with an EU/EAA email addresses, anyone who listed an EU/EAA country, or anyone who listed "International" as their country. And, of course, anyone who has opted out of our emails won't get them.

Thanks for your support!
Kategórie: Novinky z projektov

Leonids Shower Challenge

PrimeGrid - So, 17.11.2018 - 15:02
From November 17th, 2018 Primegrid will be running an AP27 Challenge to celebrate the Leonid Meteor Shower. The Leonids are a prolific meteor shower associated with the comet Tempel–Tuttle. The Leonids get their name from the location of their radiant in the constellation Leo: the meteors appear to radiate from that point in the sky. The Challenge starts at 12:00 UTC and ends 3 days later on 20th November at 12:00 UTC. Work units from the AP27 project, which are downloaded and completed during the challenge will count towards your challenge score. An AP26 was found just before the start of the Challenge. Can we find an AP27? For more information and discussion, please head over to the official challenge thread: http://www.primegrid.com/forum_thread.php?id=8268 Good luck!
Kategórie: Novinky z projektov

Account deletion enabled...

SETI@Home - So, 10.11.2018 - 04:56
We've finally got the BOINC account deletion feature installed and enabled. Account deletion cannot be undone. You'll also need your password and a valid email address for identity verification.

You can access it from your account settings on the web site.
Kategórie: Novinky z projektov

Fix for Slow Forums

PrimeGrid - So, 10.11.2018 - 03:02
If you've been experiencing slow-loading forums at PrimeGrid, or, for that matter, any BOINC project's forums, the reason is because the Free-DC website has been down a lot recently. Many people use forum signature images from Free-DC, which your browser loads when it displays forum messages. If Free-DC is down, your browser has to wait for the image request to Free-DC to time out. That's why the forum pages load slowly. If you want forum pages to load more quickly, go to the Community Preferences page and check the "hide signatures" box. Don't forget to click on the "Update" button at the bottom.
Kategórie: Novinky z projektov

De novo design of self-assembling helical protein filaments

Rosetta@home - Pi, 09.11.2018 - 21:40
Another de novo design publication was released today describing the design of micron scale self-assembling helical filaments based on previously designed repeat proteins for which R@h participants contributed computing towards. Although R@h was not directly used for this study, R@h participants provided computing for related research. Thank you all for your continued contributions.

Read more here in Science.

Kategórie: Novinky z projektov

De novo design of jellyroll structures

Rosetta@home - Pi, 09.11.2018 - 01:02
Sorry for the late post. Last week the Baker lab and collaborators published the first example of proteins designed with non-local beta strand topology.

You can read more about this study here and the publication here.

Thanks to all Rosetta@home participants who contributed to this research.

Kategórie: Novinky z projektov

Thanks for supporting SixTrack at LHC@Home and updates

LHC@home - Ut, 23.01.2018 - 19:08
Dear volunteers,

All members of the SixTrack team would like to thank each of you for supporting our project at LHC@Home. The last weeks saw a significant increase in work load, and your constant help did not pause even during the Christmas holidays, which is something that we really appreciate!

As you know, we are interested in simulating the dynamics of the beam in ultra-relativistic storage rings, like the LHC. As in other fields of physics, the dynamics is complex, and it can be decomposed into a linear and a non-linear part. The former allows the expected performance of the machine to be at reach, whereas the latter might dramatically affect the stability of the circulating beam. While the former can be analysed with the computing power of a laptop, the latter requires BOINC, and hence you! In fact, we perform very large scans of parameter spaces to see how non-linearities affect the motion of beam particles in different regions of the beam phase space and for different values of key machine parameters. Our main observable is the dynamic aperture (DA), i.e. the boundary between stable, i.e. bounded, and unstable, i.e., unbounded, motion of particles.

The studies mainly target the LHC and its upgrade in luminosity, the so-called HL-LHC. Thanks to this new accelerator, by ~2035, the LHC will be able to deliver to experiments x10 more data than what is foreseen in the first 10/15y of operation of LHC in a comparable time. We are in full swing in designing the upgraded machine, and the present operation of the LHC is a unique occasion to benchmark our models and simulation results. The deep knowledge of the DA of the LHC is essential to properly tune the working point of the HL-LHC.

If you have crunched simulations named "workspace1_hl13_collision_scan_*" (Frederik), then you have helped us in mapping the effects of unavoidable magnetic errors expected from the new hardware of the HL-LHC on dynamic aperture, and identify the best working point of the machine and correction strategies. Tasks named like "w2_hllhc10_sqz700_Qinj_chr20_w2*" (Yuri) focus the attention onto the magnets responsible for squeezing the beams before colliding them; due to their prominent role, these magnets, very few in number, have such a big impact on the non-linear dynamics that the knobs controlling the linear part of the machine can offer relevant remedial strategies.

Many recent tasks are aimed at relating the beam lifetime to the dynamic aperture. The beam lifetime is a measured quantity that tells us how long the beams are going to stay in the machine, based on the current rate of losses. A theoretical model relating beam lifetime and dynamic aperture was developed; a large simulation campaign has started, to benchmark the model against plenty of measurements taken with the LHC in the past three years. One set of studies, named "w16_ats2017_b2_qp_0_ats2017_b2_QP_0_IOCT_0" (Pascal), considers as main source of non-linearities the unavoidable multipolar errors of the magnets, whereas tasks named as "LHC_2015*" (Javier) take into account the parasitic encounters nearby the collision points, i.e. the so called "long-range beam-beam effects".

One of our users (Ewen) is carrying out two studies thanks to your help. In 2017 DA was directly measured for the first time in the LHC at top energy, and nonlinear magnets on either side of ATLAS and CMS experiments were used to vary the DA. He wants to see how well the simulated DA compares to these measurements. The second study seeks to look systematically at how the time dependence of DA in simulation depends on the strength of linear transverse coupling, and the way it is generated in the machine. In fact, some previous simulations and measurements at injection energy have indicated that linear coupling between the horizontal and vertical planes can have a large impact on how the dynamic aperture evolves over time.

In all this, your help is fundamental, since you let us carry out the simulations and studies we are interested in, running the tasks we submit to BOINC. Hence, the warmest "thank you" to you all!
Happy crunching to everyone, and stay tuned!

Alessio and Massimo, for the LHC SixTrack team.
Kategórie: Novinky z projektov

LHC@home down-time due to system updates

LHC@home - Ut, 23.01.2018 - 11:19
Tomorrow Wednesday 24/1, the LHC@home servers will be unavailable for a short period while our storage backend is taken down for a system update.

Today, Tuesday 23/1, some of the Condor servers that handle CMS, LHCb and Theory tasks will be down for a while. Regarding the on-going issues with upload of files, please refer to this thread.

Thanks for your understanding and happy crunching!
Kategórie: Novinky z projektov
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